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Threshold Energy and Unimolecular Rate Constant for Elimination of HF from Chemically Activated CF 3 CF 2 CH 3 : Effect of the CF 3 Substituent on the α-Carbon

✍ Scribed by McDoniel, J. Bridget; Holmes, Bert E.

Book ID: 126111327
Publisher: American Chemical Society
Year: 1997
Tongue: English
Weight: 114 KB
Volume: 101
Category: Article
ISSN: 1089-5639
DOI: 10.1021/jp963032a

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Rate constant ratios, k d /k c , for the disproportionation/combination reaction at a temperature of 295 Ϯ 2 K, have been measured as 0.034 Ϯ 0.009 for the collision between CF 3 CH 2 CF 2 ϩ CF 3 radicals and as 0.075 Ϯ 0.019 for CF 3 CH 2 CF 2 ϩ CF 3 CH 2 CF 2 radicals. The effect of the two fluori

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Disproportionation/combination rate constant ratios, k , / k , , have been measured for the collision between CF3CH2CH2 and CF3 radicals to be 0.022 ? 0 002 and for CF3CH2CH2 and CF3CH2CH2 radicals to be 0.100 IT 0.002. Comparison to previous work from this laboratory for the reaction of CF3CH2CHCI

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Disproportionationkombination rate constant ratios, kd/&[, for the reactive collision between CF3CH2CHX + CF, radicals and between CF3CH2CHX + CF3CH2CHX radicals have been measured for X = CF, The kd/k, = 0.066 -t 0 01 3 when H is transferred to the CF3 radical and 0 I25 ? 0.025 for H transfer to th

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## Abstract Rate constant ratios, __k__~d~/__k__~c~ for the disproportionation/combination reaction have been measured as 0.07 ± 0.02 when an H is removed from the CH~2~ position of the CF~3~CH~2~CHCH~3~ radical and as 0.24 ± 0.03 when the H is removed from the CH~3~ position in the reaction with t